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参考公式 三角函数和差化积公式:‘n·+sin口一,sin宁·。宁;“·+”“二2此宁·邸宁;‘na一s、,=2哪甲·sin二。一、一2sin甲·沟 ;︸一,‘二Zn正棱台、圆台的侧面积公式:。1,,S台侧二言(“‘+“)l,其中。‘,‘分别表示上、下底面周长,l表示斜高或母线长.台体的体积公式: 1,,,
Reference formula The trigonometric function and differential product formula: ‘n·+sin mouth one, sinning. Ning; “· +” “2 2 this Ning Ning Ning; ’na a s,, = 2 which a sin two. One, one 2sin Jiagou; } one, ’two Zn positive truncated platform, the side of the circular table Area formula: 1., S: Two sides of the ”S“ side (”’+“)l, where ”," denotes the perimeter of the upper and lower sides, respectively, and l denotes the slope height or the length of the busbar. Volume formula of the table body: 1, ,,,